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SDS-8015

Trusted

Industrial Control System

Trusted

Application Validators - T8015

Issue 5 Jan 2006

INTRODUCTION

The IEC-1131 TOOLSET Application

Validators comprises a set of three specially

developed Windows based programs that

support the user when using the IEC-1131

TOOLSET

to develop safety related

applications.

APPLICATION VALIDATOR 1

A primary goal for applications engineers when

using ISaGRAF in safety-related applications is

to minimise the interaction between

applications programs within an ISaGRAF

project. Interaction is most likely to occur

when two or more programs access the same

variable. Changes to one program that

accesses a shared variable must be tested, as

should those other programs that read/write

the same variable.

Application Validator 1 implements a cross-

reference check of the application programs to

determine the identity, and number, of

programs accessing the same variable. The

file generated by the IEC-1131 TOOLSET

cross-reference function contains details of

programs and variables within the users

application. The first application validator

processes this file to build a table of

dependencies. The dependencies are defined

by programs that share one or more variables.

A ‘tree view’ (see SCREEN DISPLAY overleaf)

is presented to the user with nodes highlighted

in red to show those programs and variables

that interact. This information enables the user

to identify which programs must be re-tested

due to direct or indirect changes, i.e. via

shared variables.

APPLICATION VALIDATOR 2

The second validator is used, in

conjunction with the first, to trap any

dependencies that the IEC-1131

Compiler introduced either through

optimisation or error. This validator

processes the intermediate (TIC) code

produced by the IEC-1131

Compiler and

once again presents the user with a

‘tree view’ of the application

dependencies that have been

determined.

APPLICATION VALIDATOR 3

The third validator provides the user

with the ability to compare two versions

of a compiled program. This validator

can show the user which programs differ

from one version of the application to

another enabling him to ensure that

appropriate testing is performed and

that the changes are indeed what were

expected.

FEATURES

 Windows NT/XP

applications

 On screen and

printed reports

available

 Results presented

in ‘easy to use’

format

1 2

Indice de contenidos

Pagina 1 - FEATURES

SDS-8015 TrustedTM Industrial Control System TrustedTM Application Validators - T8015 Issue 5 Jan 2006 INTRODUCTION The IEC-1131 TOOLSET Application

Pagina 2 - REQUIREMENTS

SDS-8015 TrustedTM Industrial Control System TrustedTM Application Validators - T8015 ICS Triplex Technical data sheets are intended for informat

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